Key Parameters Of Medical Imaging Display--Response Time

Response time is the speed at which the display responds to the input signal. That is, the reaction time of liquid crystal from dark to light or light to dark, usually in milliseconds (ms).

There are two parts--Rising and Falling. When we say response time, we mean the sum of the two. There is a phenomenon of "residual vision" in the human eye. The acceptable screen display speed is generally 24 frames per second. If the display speed is lower than this standard, people will obviously feel the pause and discomfort of the picture.

According to this standard, the display time of each picture needs to be less than 40ms. According to the actual use of the liquid crystal, the response time is 30ms (1/0.03=33.3 frames/second), and there will still be a tailing phenomenon, not suitable for real-time playback of dynamic medical images. The response time is less than 25ms (1/0.025=40 frames/second), which can meet the real-time playback of the clinical cardiovascular digital angiography system. In the selection of medical monitors, CR and DR static images do not have high requirements for response time, however, in the system configuration of playing dynamic images, such as medical digital subtraction angiography machines and digital gastrointestinal machines, medical monitors with a response time of less than 25ms are preferred.